What is a Galaxy Halo Really Like?

0 Assigned ID: 571 ----- Attempting Submission 1 (Fri Apr 08 16:18:59 GMT 2016) ----- Second submission: change from MIRROR-B to MIRROR-A for ACQ of UV-faint targets; change FP-POS patterns to specific numbers instead of FP-POS=ALL. -1506942175 ----- Attempting Submission 1 (Sat Jul 09 21:35:55 GMT 2016) ----- HST Phase II Proposal 14684 (n1097.apt) successfully submitted. Receipt: # 14684-1 ----- Attempting Submission 2 (Mon Jul 18 15:47:08 GMT 2016) ----- What is a Galaxy Halo Really Like? In Cycle 20 we used COS to map the baryons in the halo of NGC 1097 by recording the absorption lines towards 4 QSOs whose sightlines passed through the galaxy's circumgalactic medium (CGM). In this proposal we seek to extend the map by observing 4 new probes within the virial radius of the galaxy, thereby improving the `resolution' of our map. NGC 1097 is a nearby, bright (cz=1271 km/s, L~ 1.7L*) spiral galaxy, which has the highest density of UV-bright background objects behind it. Our mapping consists of detecting Lyman-alpha (Lya) lines, as well as low-ionization lines of Si II and C II, and higher ionization lines of Si III and Si IV, from the galaxy's CGM. The analysis of our Cycle 20 data suggested that the CGM was dominated by rotating gas falling in from the IGM, with perhaps some smaller contribution from an outflow at small radii. With 4 new probes, we would test this conclusion more vigorously, and produce the most extensive map of the physical conditions of the baryons in a galactic halo outside of the Local Group. We plan to use the G130M grating of COS to search for absorption lines from gas in the halo of NGC1097, towards 4 background UV probes. Exposures towards individual sightlines are split into two halves with different central wavelengths (1291 and 1327A) in order to cover the gap in the COS detectors whenever possible. For each central wavelength, we use FP-POS=ALL in all cases. The targets are bright star-forming galaxies, and have known GALEX FUV fluxes. Our allocation of 22 orbits is divided up between targets as: target 1: 7 orbits target 2: 6 orbits target 3: 4 orbits target 4: 5 orbits Intergalactic Medium and Cosmology 6 false true false false false false AVAILABLE GALAXY STARBURST NO GALEX size: NUV_FWHM_WORLD = 8 arcsec; FUV_FHWM_WORLD = 7 arcsec J2000 J2000 GALEX FUV=55 micro-Jy GALAXY STARBURST NO GALEX sizes: NUV_FWHM_WORLD = 7 arcsec; FUV_FWHM_WORLD = 8 arcsec J2000 J2000 GALEX FUV=60 micro-Jy GALAXY STARBURST NO GALEX size: NUV_FWHM_WORLD = 13 arcsec; FUV_FWHM_WORLD = 5 arcsec J2000 J2000 GALEX FUV=103 micro-Jy GALAXY STARBURST NO GALEX size: NUV_FWHM_WORLD = 6 arcsec; FUV_FWHM_WORLD = 5 arcsec J2000 J2000 GALEX FUV=78 micro-Jy COS/FUV Spectroscopic No No G130M 1291 COS/FUV Spectroscopic No No G130M 1291 COS/FUV Spectroscopic No No G130M 1291 COS/FUV Spectroscopic No No G130M 1291 1468856552989 The scheduling data was generated by CASM 24.2. CASM was run in Phase II mode. First visit to target 1, CENWAVE set to 1291, first 3 orbits of 7 in total (Tic-Visit :proposal-id 14684 :visit-id "01" :proposal-version -1 :trans-version "20160601" :date "18-Jul-2016 11:42:32.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 3 :saa-model "31" :si-bright-earth-limb-angle 20.0 :data-volume 469888 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 14684 :visit-id "01" :obset-id "01" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 14684 :visit-id "01" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2912 :al-overhead-at-end 0 :internal-dur-at-end 38 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3245 :pcs-gap 0 ) (Tic-Orbit :proposal-id 14684 :visit-id "01" :orbit-number 2 :pcs-time 222 :si-vis-utilization 3023 :al-overhead-at-end 0 :internal-dur-at-end 48 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3245 :pcs-gap 0 ) (Tic-Orbit :proposal-id 14684 :visit-id "01" :orbit-number 3 :pcs-time 222 :si-vis-utilization 3023 :al-overhead-at-end 0 :internal-dur-at-end 331 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3245 :pcs-gap 0 ) false 3 0 Exposure time are calculated assuming GALEX NUV flux [m(NUV)=19.1] is half that expected [m=19.9] in order to account for possible flux variations FP-POS =3 split across orbits to keep exposure times at each FP-POS similar in length 1468697692937 The scheduling data was generated by CASM 24.2. CASM was run in Phase II mode. Second visit to target 1, CENWAVE set to 1327 to fill GAP, final 4 orbits of 7 in total (Tic-Visit :proposal-id 14684 :visit-id "02" :proposal-version -1 :trans-version "20160601" :date "16-Jul-2016 15:34:52.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 4 :saa-model "31" :si-bright-earth-limb-angle 20.0 :data-volume 365408 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 14684 :visit-id "02" :obset-id "02" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 14684 :visit-id "02" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2912 :al-overhead-at-end 0 :internal-dur-at-end 38 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3245 :pcs-gap 0 ) (Tic-Orbit :proposal-id 14684 :visit-id "02" :orbit-number 2 :pcs-time 222 :si-vis-utilization 3023 :al-overhead-at-end 0 :internal-dur-at-end 124 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3245 :pcs-gap 0 ) (Tic-Orbit :proposal-id 14684 :visit-id "02" :orbit-number 3 :pcs-time 222 :si-vis-utilization 3023 :al-overhead-at-end 0 :internal-dur-at-end 124 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3245 :pcs-gap 0 ) (Tic-Orbit :proposal-id 14684 :visit-id "02" :orbit-number 4 :pcs-time 222 :si-vis-utilization 3023 :al-overhead-at-end 0 :internal-dur-at-end 417 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3245 :pcs-gap 0 ) false 4 0 Exposure time are calculated assuming GALEX NUV flux [m(NUV)=19.1] is half that expected [m=19.9] in order to account for possible flux variations 1468697698873 The scheduling data was generated by CASM 24.2. CASM was run in Phase II mode. First visit to target 2, first 3 orbits of 6, CENWAVE set to 1291 (Tic-Visit :proposal-id 14684 :visit-id "03" :proposal-version -1 :trans-version "20160601" :date "16-Jul-2016 15:34:58.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 3 :saa-model "31" :si-bright-earth-limb-angle 20.0 :data-volume 469888 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 14684 :visit-id "03" :obset-id "03" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 14684 :visit-id "03" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2907 :al-overhead-at-end 0 :internal-dur-at-end 38 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3245 :pcs-gap 0 ) (Tic-Orbit :proposal-id 14684 :visit-id "03" :orbit-number 2 :pcs-time 222 :si-vis-utilization 3023 :al-overhead-at-end 0 :internal-dur-at-end 48 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3245 :pcs-gap 0 ) (Tic-Orbit :proposal-id 14684 :visit-id "03" :orbit-number 3 :pcs-time 222 :si-vis-utilization 3023 :al-overhead-at-end 0 :internal-dur-at-end 331 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3245 :pcs-gap 0 ) false 3 0 Exposure time are calculated assuming GALEX NUV flux [m(NUV)=19.5] is half that expected [m=20.3] in order to account for possible flux variations. FP-POS =3 split across orbits to keep exposure times at each FP-POS similar in length 1468698038453 The scheduling data was generated by CASM 24.2. CASM was run in Phase II mode. Second visit to target 2, second 3 orbits of 6, CENWAVE set to 1327 (Tic-Visit :proposal-id 14684 :visit-id "04" :proposal-version -1 :trans-version "20160601" :date "16-Jul-2016 15:40:38.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 3 :saa-model "31" :si-bright-earth-limb-angle 20.0 :data-volume 469888 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 14684 :visit-id "04" :obset-id "04" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 14684 :visit-id "04" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2912 :al-overhead-at-end 0 :internal-dur-at-end 38 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3245 :pcs-gap 0 ) (Tic-Orbit :proposal-id 14684 :visit-id "04" :orbit-number 2 :pcs-time 222 :si-vis-utilization 3023 :al-overhead-at-end 0 :internal-dur-at-end 48 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3245 :pcs-gap 0 ) (Tic-Orbit :proposal-id 14684 :visit-id "04" :orbit-number 3 :pcs-time 222 :si-vis-utilization 3023 :al-overhead-at-end 0 :internal-dur-at-end 331 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3245 :pcs-gap 0 ) false 3 0 Exposure time are calculated assuming GALEX NUV flux [m(NUV)=19.5] is half that expected [m=20.3] in order to account for possible flux variations. FP-POS =3 split across orbits to keep exposure times at each FP-POS similar in length 1468697709129 The scheduling data was generated by CASM 24.2. CASM was run in Phase II mode. Only visit to target 3 (4 orbits), CENWAVE set to 1291 for first 2 orbits, then 1327 for final 2 orbits, to span GAP. 1489021573000 106.88468230227733 (Tic-Visit :proposal-id 14684 :visit-id "05" :proposal-version -1 :trans-version "20160601" :date "16-Jul-2016 15:35:09.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 4 :saa-model "31" :si-bright-earth-limb-angle 20.0 :data-volume 713536 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 14684 :visit-id "05" :obset-id "05" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 14684 :visit-id "05" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2902 :al-overhead-at-end 0 :internal-dur-at-end 38 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3245 :pcs-gap 0 ) (Tic-Orbit :proposal-id 14684 :visit-id "05" :orbit-number 2 :pcs-time 222 :si-vis-utilization 3023 :al-overhead-at-end 0 :internal-dur-at-end 38 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3245 :pcs-gap 0 ) (Tic-Orbit :proposal-id 14684 :visit-id "05" :orbit-number 3 :pcs-time 222 :si-vis-utilization 3023 :al-overhead-at-end 0 :internal-dur-at-end 38 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3245 :pcs-gap 0 ) (Tic-Orbit :proposal-id 14684 :visit-id "05" :orbit-number 4 :pcs-time 222 :si-vis-utilization 3023 :al-overhead-at-end 0 :internal-dur-at-end 331 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3245 :pcs-gap 0 ) false 4 0 Exposure time are calculated assuming GALEX NUV flux [m(NUV)=18.8] is half that expected [m=19.5] in order to account for possible flux variations. 1468697714966 The scheduling data was generated by CASM 24.2. CASM was run in Phase II mode. Ony visit to target 4 (5 orbits), CENWAVE set to 1291 for orbits 1 & 2, then 1327 for 3 & 4 orbits to fill GAP. Return to CENWAVE = 1291 for final orbit. We're aware that 5 orbits is the maximum recommended for a single visit. The visit planner suggets that the 5 orbit visit is not difficult to schedule, so we're leaving this as a single visit unless instructed to break the visit into two separate visits. (Tic-Visit :proposal-id 14684 :visit-id "06" :proposal-version -1 :trans-version "20160601" :date "16-Jul-2016 15:35:14.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 5 :saa-model "31" :si-bright-earth-limb-angle 20.0 :data-volume 1139744 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 14684 :visit-id "06" :obset-id "06" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 14684 :visit-id "06" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2895 :al-overhead-at-end 0 :internal-dur-at-end 124 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3229 :pcs-gap 0 ) (Tic-Orbit :proposal-id 14684 :visit-id "06" :orbit-number 2 :pcs-time 222 :si-vis-utilization 3007 :al-overhead-at-end 0 :internal-dur-at-end 38 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3229 :pcs-gap 0 ) (Tic-Orbit :proposal-id 14684 :visit-id "06" :orbit-number 3 :pcs-time 222 :si-vis-utilization 3007 :al-overhead-at-end 0 :internal-dur-at-end 38 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3229 :pcs-gap 0 ) (Tic-Orbit :proposal-id 14684 :visit-id "06" :orbit-number 4 :pcs-time 222 :si-vis-utilization 3007 :al-overhead-at-end 0 :internal-dur-at-end 38 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3229 :pcs-gap 0 ) (Tic-Orbit :proposal-id 14684 :visit-id "06" :orbit-number 5 :pcs-time 222 :si-vis-utilization 3005 :al-overhead-at-end 0 :internal-dur-at-end 341 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3229 :pcs-gap 0 ) false 5 0 Exposure time are calculated assuming GALEX NUV flux [m(NUV)=19.0] is half that expected [m=19.8] in order to account for possible flux variations.